早期收缩

By inhibiting vasoconstriction, the use of low-dose aspirin in the first trimester could influence placentation and therefore prevent or delay development of hypertensive pregnancy complications, such as pregnancy-induced hypertension and pre-eclampsia.

在妊娠早期的三个月使用低剂量阿司匹林可以作用于胎盘，通过抑制胎盘血管收缩从而防止或推迟妊娠高血压并发症的发展，如妊娠高血压综合征和先兆子痫。

Admixing vegetable fibers into concrete can reduce the plastic constraint crack at early age and improve its crack resistance performance greatly.

植物纤维的掺入可减少混凝土早期的收缩裂缝，并大大改善混凝土的抗裂性能。

This report described the nursing process of a twins primipara woman with preterm uterine contraction during the twenty-first week of pregnancy.

本报告是描述一位具护理背景怀有双胞胎之初孕妇，在妊娠21周因早期子宫收缩至本院住院安胎之护理过程。

It provided the reference to improve the anti-cracking capability of high strength and high performance concrete from the point of view of constructional technology and curing requirement.The result shows that the more the binder material or sand rate, the more serious the shrinkage cracking. In the concrete with a low water-to-binder ratio, a bit of difference in the dosage of water will result in big difference on the strength and the anti-cracking capability. The occurrence of cracking is mainly at early age (before 1 day). If the surface is plastered again after 2 hours of casting, the anti-cracking capability will nicely improved.

研究结果表明：随着胶结料总量和砂率的增大，高强高性能混凝土的收缩开裂趋于严重；在水胶比较低的情况下，用水量的稍微差别对混凝土的强度和抗裂性能都具有很大的影响；掺入粉煤灰对抗裂有所改善，但是其掺量对抗裂的影响并不是呈定向规律，而是存在着最优掺量；高强高性能混凝土的裂缝主要发生在早期(1d前)，若在浇注后2个小时再次抹面可以很好地改善其抗裂性能。

The basin is one of the Cenozoic rift basins, which has experienced a series of paleo-climate change since Early Pleistocene, including wet cold, wet-warm, and arid. A former lake was believed to develop at the early stage of late Pleistocene (around 120 ka BP), and vanish during the Holocene. With the vanishment of the lake, the early Yellow River occurred. It results in a complex sedimentary environment with fluvial and lacustrine sediments interlacing each other.

河套盆地是一个新生代断陷盆地，自更新世早期以来经历了由湿冷-湿冷/暖-全新世干旱的古气候变化，盆地的发展经历了湖泊全盛期-收缩期-消亡期-河流发育期，沉积环境演化为湖积/河积交错沉积。

It will be demonstrated that these methods are able to monitor bronchoconstriction in safety-pharmacological tests or in asthma models showing early allergic response or late airway hyperresponsieness in response to inhaled allergens and demonstrate drug effects on pulmonary endpoints.

这些方法在安全药理学实验中可以监测支气管的收缩性，在吸入变应原的哮喘模型中可以显示早期的过敏反应和晚期的气道高反应性，并可以监测药物对肺功能的最终影响。

Doetschman TC, Eistetter H, Kemler R, et al. The in vitro development of blastocyst-derived embryonic stem cell lines: formation of visceral yolk sac, blood islands and myocardium ［J］. J Embryol Exp Morph, 1985,87:27～45.［2］ Robbins J, Doetschman T, Jones WK, et al. Embryonic stem cell as a model for cardiogenesis［J］. Trends Cardiovasc Med, 1992,2:44～50.［3］ Moreadith RW, Radford NB.

被诱导的心肌细胞的判定除常规指标外，我们还用了心脏特异性引物β-MHC对不同收缩时间的心肌细胞总RNA进行RT-PCR扩增和RNA斑点杂交，发现该心肌细胞不仅具有正常心肌细胞的特性，而且在分化早期就高度地表达心脏特异性基因。

Methods In total 148pregnant women were enro lled in this study. The e-chogenic feature and the blood flow i ndexesof the ovarian corpus luteum were ass essed from4th to 12th gestational week with tra ns-vaginal color Doppler ultrasono graphy.

方法采用经阴道超声检测148例早期妊娠4～12周孕妇的卵巢，观察卵巢内黄体的二维声像及彩色多普勒血流改变，检测收缩期最大峰值流速、阻力指数及搏动指数。

SRI are helpful in assessing the early left ventricular systolic and diastolic dysfunction and myocardiac damage sensitively in T2DM patients.

SRI技术能早期检测到糖尿病患者的左室收缩与舒张功能异常和心肌病变。

Methods Blood flow dynamics of the central retinal arteryby CDFI was examined in 22 patients(30 eyes)with early visual field change of glaucoma,which were diagnosed by OCTOPUS 101 automated perimetry,and 22 normal subjects(31 eyes).

OCTO PUS10 1视野计检查明确有早期视野改变的青光眼患者 2 2例(3 0只眼)和正常眼 18例(3 1只眼)进行彩色多普勒血流显像检查，比较各组收缩期峰值速度舒张末期速度和阻力指数。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。